January 5, 2009

This lesson explores how to convert fractions into decimals.

This lesson is aimed at grades 5-6. Those students in grades 7-9 including students with disabilities, who are in need of more experience or practice can benefit from these lessons.

- Mathematics > General
- Mathematics > Arithmetic
- Mathematics > Number Sense & Operations
- Mathematics > Problem Solving

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relate decimals to fractions that name tenths and hundredths; and

Use a spring scale to measure the weights of several objects accurately. Explain that the weight of an object is a measure of the force of gravity on the object. Record the measurements in a table.

Measure the distance that an object travels in a given interval of time and compare it with the distance that another object moved in the same interval of time to determine which is fastest.

Measure the time it takes two objects to travel the same distance and determine which is fastest.

Explain that water is still the same substance when it is frozen as ice or evaporated and becomes a gas.

Explain that a balloon expands when you blow air into it because blowing air into the balloon creates greater air pressure inside the balloon than outside the balloon.

Describe how the wind can move things (e.g., wind can move the branches of trees when it blows and moves sailboats through the water).

Explain that dissolved substances have not disappeared, and cite evidence to determine that the substance is still there (e.g., sprinkle sugar on cereal, add milk, and you can taste it even though you can no longer see the sugar).

Predict that the weight of a sample of water will be nearly the same before and after it is frozen or melted. Explain why the weight will be almost the same.

If an object is weighed, then broken into small pieces, predict that the small pieces will weigh the same as the large piece. Explain why the weight will be the same.

Identify different forms of energy (e.g., heat, light, sound, motion, electricity) in a system.

Draw and label diagrams showing several ways that energy can be transferred from one place to another (e.g., sound energy passing through air, electrical energy through a wire, heat energy conducted through a frying pan, light energy through space).

Identify several ways to generate heat energy (e.g., lighting a match, rubbing hands together, or mixing different kinds of chemicals together).

Give examples of two different ways that heat energy can move from one place to another, and explain which direction the heat moves (e.g., when placing a pot on the stove, heat moves from the hot burner to the cooler pot).

Demonstrate how sound can be generated by vibrations, and explain how sound energy is transferred through the air from a source to an observer.

Connect wires to produce a complete circuit involving a battery and at least one other electrical component to produce observable change (e.g., light a bulb, sound a buzzer, and make a bell ring).

Repair an electric circuit by completing a closed loop.

Describe how electrical energy is transferred from one place to another, and how it is transformed from electrical energy to different kinds of energy in the circuit above.